@article{1102971484,
author = {Levin, Richard G. and Tamura, Takayuki},
title = {Notes on commutative power joined semigroups.},
journal = {Pacific J. Math.},
volume = {35},
number = {3},
year = {1970},
pages = { 673-679},
language = {en},
url = {http://dml.mathdoc.fr/item/1102971484}
}
Levin, Richard G.; Tamura, Takayuki. Notes on commutative power joined semigroups.. Pacific J. Math., Tome 35 (1970) no. 3, pp. 673-679. http://gdmltest.u-ga.fr/item/1102971484/